Intel Core i7 6900K vs Intel Core i7 7800X

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We compared two desktop CPUs: Intel Core i7 6900K with 8 cores 3.2GHz and Intel Core i7 7800X with 6 cores 3.5GHz . You will find out which processor performs better in benchmark tests, key specifications, power consumption and more.

Main Differences

Intel Core i7 6900K 's Advantages

Larger L3 cache size (20MB vs 8MB)

Intel Core i7 7800X 's Advantages

Released 1 years late

Higher specification of memory (DDR4-2400 vs DDR4-2133)

Larger memory bandwidth (79.47GB/s vs 76.8GB/s)

Higher base frequency (3.5GHz vs 3.2GHz)

Score

Benchmark

Cinebench R23 Single Core

Intel Core i7 6900K +19%

1151

Intel Core i7 7800X

963

Cinebench R23 Multi Core

Intel Core i7 6900K +55%

11326

Intel Core i7 7800X

7269

Geekbench 6 Single Core

Intel Core i7 6900K

1286

Intel Core i7 7800X +5%

1362

Geekbench 6 Multi Core

Intel Core i7 6900K +22%

7470

Intel Core i7 7800X

6082

Geekbench 5 Single Core

Intel Core i7 6900K

961

Intel Core i7 7800X +11%

1069

Geekbench 5 Multi Core

Intel Core i7 6900K +11%

7327

Intel Core i7 7800X

6578

Passmark CPU Single Core

Intel Core i7 6900K

2310

Intel Core i7 7800X +4%

2409

Passmark CPU Multi Core

Intel Core i7 6900K +10%

14258

Intel Core i7 7800X

12894

Intel Core i7 6900K

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Intel Core i7 7800X

General Parameters

May 2016

Release Date

May 2017

Intel

Manufacturer

Intel

Desktop

Type

Desktop

x86-64

Instruction Set

x86-64

Broadwell E

Core Architecture

Skylake

i7-6900K

Processor Number

i7-7800X

LGA-2011-3

Socket

LGA-2066

N/A

Integrated Graphics

N/A

Package

14 nm

Manufacturing Process

14 nm

LGA-2011-3

Socket

LGA-2066

140 W

Power Consumption

140 W

-

Peak Operating Temperature

100 °C

CPU Performance

8

Performance Cores

6

16

Performance Core Threads

12

3.2 GHz

Performance Core Base Frequency

3.5 GHz

3.7 GHz

Performance Core Turbo Frequency

4 GHz

8

Total Core Count

6

16

Total Thread Count

12

100 MHz

Bus Frequency

100 MHz

32x

Multiplier

35x

64 K per core

L1 Cache

64 K per core

256 K per core

L2 Cache

1 MB per core

20 MB shared

L3 Cache

8 MB shared

No

Unlocked Multiplier

Yes

Memory Parameters

DDR4-2133

Memory Types

DDR4-2400

128 GB

Max Memory Size

128 GB

4

Max Memory Channels

4

76.8 GB/s

Max Memory Bandwidth

79.47 GB/s

No

ECC Memory Support

No

Miscellaneous

Intel Core i7 6900K

Official Website

Intel Core i7 7800X

3.0

PCIe Version

3.0

40

PCIe Lanes

28

-

Extended Instruction Set

SSE4.1, SSE4.2, AVX-2, AVX-512

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